#3: Compress air system

Question 1

Pressures of compressed air
starting
deck equipment
maintenance work
control instruments

Answer 1

• starting = 30
• deck equipment =7
• maintenance work =7
• control instruments =1-7

Question 2

main air compressors

Answer 2

compress the air to 30-bar pressure and stored it in big air cylinders called air bottles or receivers.

Question 3

Reducing valve (automatic control instruments)

Answer 3

requires very clean air
taken from the service air bottle (at 7 bar) and reduced to 1 bar
control air had to pass through fine filters and dehydrators to remove the dirt, oil and water content

Question 4

Emergency Air Bottle

Answer 4

contains a limited supply of air
main function is to supply compressed air to start a generator when the main air receivers are empty
run by an external source of power (small diesel engine)
must always be fully charged

Question 5

Drain valve

Answer 5

to drain moisture